Can receive mail, unable to send with postfix.

Ok, I had followed the perfect setup for CentOs, and its been working great since setup. The problem started when I did some networking at home, and was forced to change the IP on the server. Ever since I changed the IP on the server, I have been unable to send emails, period!

I tried to recreate the SSL key and still no cigar. I will post all info below so that you can see exactly what is happening. Please advise.

Ok, actually I reinstalled postfix again, and recreated the certificates... I almost rendered my server useless in the process when I was working on it by uninstalling a bunch of http/mail server related files by accident.

Nonetheless I reinstalled all successfully except for saslauth, and the mailserver has been working fine since then. (knock on wood)

I checked my status in the mxtoolbox, and noticed that I was on about 4-6 blacklists, I got all removed except for one, which I am still waiting on.

Thanks for the help, I will recheck my maillog and look for any suspicious errors.

The possibility a dynamic IP get's removed from block lists is highly UN-likely. For myself, I block dynamic IP's right at the MTA level and I never look back. There are way too many zombies nowadays.

Getting a proper fixed IP on a home line is rather unlikely. In NL, poroviders say you get a static address, but that still is in the dynamic range, so no luck. Might differ in other countries though. Servers in approved datacenters normally get a real fixed IP, which are worldwide recognized as static.

out here in Canada, well saskatchewan if you want to narrow it down to ISPs we can request a static IP address but it will cost a bit more for the internet like $30cad more then the regular internet with a dynamic IP and well, i cant afford an extra $30 ontop of what i pay for bills

Perhaps you can configure postfix to use your ISP mailserver as a relay? That's the most common 'trick' to avoid sending mail from dynamic IP's. Receivers will then see the mailserver of the ISP as the sender and your mail will not be blocked (unless your ISP is on blacklists )